Page 52 - Journal of Structural Heart Disease Volume 5, Issue 4

Meeting Abstracts 114
65. Figure 2. Over-inflation of the 10mm stents. The columns show each stent inflated to 12 atm with the intended delivery balloon and 14mm balloon. The fourth column shows stent appearance at time of fracture. "The iCast 10mm stent is shown during inflation; a photograph was not taken after deflation.
A) The 10mm VBX stent fractured at inflation to 18 atm on the 14 balloon
B) The 10mm iCast stent fractured at inflation to 18 atm on the 14 balloon C) The 10mm Lifestream stent fractured at 12 atm on the 20 balloon
66. RADIATION EXPOSURE OF CHILDREN UNDERGO- ING CARDIAC CATHETERIZATION -COMPARISON OF DOSE AREA PRODUCT BY BODY WEIGHT-
Kazuya Sanada, Sung-Hae Kim, Mizuhiko Ishigaki, Keisuke Sato, Jun Yoshimoto, Norie Mitsushita, Masaki Nii, Yasuhiko Tanaka
Shizuoka Children's Hospital,Cardiology, Shizuoka, Japan
Background: Because of the higher radiosensitivity of infants and children compared with adults, consideration of radiation exposure is important for children with con- genital heart disease. However, it is difficult to estimate effective dose in pediatric cardiac catheterization. Dose area product by body weight (DAP / BW) correlate with the effective dose and is useful as an indicator of radiation exposure in pediatric cardiac catheterization. The objective of this study is to determine the difference of DAP/BW by procedure and age.
Methods: 2,095 patients (age< 15 years) who underwent cardiac catheterization in our institute between January 2008 and September 2017 were included in this study. The procedures consisted of diagnostic (Group D; n=1,690), coil embolization for aortopulmonary collateral arteries (Group C; n=311), balloon dilatation for pulmonary stenosis
(Group B; n=94), respectively. Data on radiation exposure [Air Karma (AK), fluoroscopy time (FT), DAP, DAP / BW] were shown by median and compared with procedure groups and age groups.
Results: The levels of AK, DAP and DAP / BW were significantly higher in Group B [AK(mGy): D; 71 , B;97,C;190,respectively ,p<0.05 , DAP(μGym^2): D; 475 ,B;590 ,C; 1,136,respectively ,p<0.05 , DAP/BW(μGym^2/ kg): D; 42.9 ,B;67.6 ,C;101.3, respectively, p<0.05], whereas FT was no significant difference between Group C and B [38.4 vs 42.2, respectively, p=0.21]. In Group B, there is no significant difference in DAP/BW between patients who underwent three-dimensional rotational angiography and those who did not [n=14,84.1vs n=80, 103.1, respectively, p=0.18]. DAP/BW was no significant difference between age groups in Group C and B[ C: 0-1y; 70.8, 1-4y; 62.8, 5-9y; 71.4, 10-15y; 87.4, respectively, p=0.374, B: 0-1y; 82.9, 1-4y; 106.0, 5-9y; 104.5, 10-15y; 86.9 ,respectively, p=0.255].
Conclusions: In this study, the effective dose of cardiac catheter intervention has more than 1.5-2 times higher than diagnosis. There is a possibility of receiving a higher radiation exposure in same procedure because the lower age group is more sensitive to radiation. DAP / BW may
Journal of Structural Heart Disease, August 2019
Volume 5, Issue 4:75-205